Rock and ore crusher.



B. W. TRAYLOR-- ROCK AND ORE GRUSHER.

APPLICATION FILED 33.28, 1910. 9 0,575 1 PatentedJan. 3, 1911.

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.B. W. TR AYLOR. ROCK AND ORB URUSHBR- APPLICATION FILED rmma, 1910.

9 0,575; PatentediJanfi, 1911.

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BRUCE W. TRAYLOR, OF NEW YORK, N. 'Y.

ROCK AND ORE CRUSHER.

Specification of Letters Patent.

Patented Jan. 3, 1911.

Application filed. February 28, 1910. Serial No. 546,480.

To all whom it may concern:

Be it known that I, BRUCE W. TRAYLOR, a citizen of the United States, residing at New York city, New York, have invented certain new and useful Improvements in Rock and Ore Crushers, of which the following is a specification.

This invention relates to rock and ore crushers, and particularly to that type of crushers known as Chilian mills, and the invention includes the novel features of construction and arrangement and combination of parts hereinafter described and particularly set forth in the appended claims.

A Chilian mill constructed in accordance with my invention is illustrated in the accompanying drawings, in which- Figure 1 is a sectional elevation of the mill, and Fig. 2 is a plan view of the rolls and driving head.

Referring by reference characters to this drawing, the numerals 3, 3, designate timbers or sills which are representative of any suitable supporting means, upon which is mounted the base 1 of the mill. This base is shown as hollow, and centrally upon the bottom thereof is secured to the bearing sleeve or journal 5 for the lower end of the vertical shaft 6 which drives the crushing rollers.

Mounted upon the upper part of the base is the pan or basin 7 in which the ore to be crushed is contained, said pan being provided on its bottom with a circular ring or track 8. The central portion of the pan is carried upwardly and provided with an elongated bearing sleeve or journal for the upper portionof the shaft 6. The pan is provided with the ordinary screens 9, and encircling launder or receptacle 10 for the reception of the crushed products which are fine enough to pass through the screen. The shaft 6 is mounted so as to be capable of free vertical movement within its bearings, being, in fact, a floating shaft, and it is driven by a gear 10 which has a spline connection 11 with the shaft and to which motion is imparted by gear 12 on shaft 13 journaled in bearing 14 of the base, and carrying pulley 15 to which power may be communicated from any suitable source.

The shaft 6 is provided at its upper end with an enlarged spherical or ball head 6* which rests in a socket formed by and be tween the two parts of the driving head. This driving head comprises a lower portion 16 which has a central opening to permit the passage of the shaft, and upwardly and inwardly extended walls 16 forming a bearing seat for the lower face of the spherical head of the shaft. The horizontally eX- tending portion or web of the head is provided with half bearing seats or journals, three in number, for the reception of the shafts 17 of the rolls 18, the other halves of the bearing seats or journals being formed in the under face of the horizontally extending portions 19 of the upper portion of the driving head. These journal bearings are milled or grooved out to provide channels to receive annular ribs or flanges 17 a turned upon the shafts 17 to hold the shafts against longitudinal movement within their bearings. The rolls are secured to the shafts in any suitable manner, as, for instance, by a gib or key 18 indicated in dotted lines in Fig. 1, and a nut and washer 18.

The central portion 19 of the upper part of the driving head is provided in its under face with a curved recess 19 to fit the upper surface of the head of the shaft, and oppositely disposed recesses are provided in the inner walls of the driving head to receive the ends of a key 20 which passes through the head 6 of the shaft, these recesses being of greater vertical dimensions than the corresponding dimensions of the ends of the key to permit the necessary rocking of the head on the spherical end of the shaft. At the same time the engagement of the key with the recesses of the bearing head causes the head to rotate with the shaft, thus causing the crushing rolls 18 to roll around upon the ring or track 8, and crush the ore thereon. The rolls are provided with the ordinary tires 18 as shown.

From the foregoing description, it will be readily seen that I provide a construction in which, while the vertical driving shaft is firmly held against any side motion or play, it is free to move vertically, and its weight and the weight of the driving head is used to augment the weight of the rolls. I am therefore enabled to use smaller rolls, and in fact to reduce the size of the parts very materially, and yet secure the same efiiciency of crushing action ordinarily accomplished by the use of much larger and heavier rolls. At the same time any one of the rolls can, when necessary, rise up to ride over any foreign substance which will not yield to the crushing action, owing to the ball and socket connection between the head and the shaft. It is to be noted, however, that any tendency of one of the rolls to thus ride up produces a tendency to drag or slip the other two rolls laterally or horizontally, and the frictional resistance thus encountered adds materially to the crushing action of the roll which is being lifted bythe lump over which it is passing. With my improvements, therefore, it will be noticed that all the rollers, when uniform, are subjected to exactly the same conditions, strains and usage due to the fact that their shafts are all connected rigidly together by the carrying head. Further, as the tires and the wear ring Swear away, the part-s will all move down together, maintaining the same operating relation between the parts, the lowering of the shaft 6 being permitted by the spline connection hereinbefore described.

Normally, the entire weight of the shaft is supported wholly by the rollers through the bearing head, as described, but I provide means by which pressure may be brought to. bear on the shaft to lift it vertically and raise the rollers. outof contact with the ring or track 8 or the material resting thereon.

"*This is desirable in starting the mill, or in case it should become choked. A convenient means of effecting this is to provide below the shaft a vertically movable screw 21 guided in a depending bracket 22, and held against rotary movement by a suitable spline connection. The screw passes through a rotary nut 23, and has its. upper end adapted to seat in a recess 21 in the lower end of the shaft 6. The nut is provided with a worm wheel 24 which is engaged by a worm 25 carried by a shaft 26 journaled in suitable bearings 27 and 28 provided at the sides of the machine with suitable operating means, such as cranks 29. Thus while the screw is normally but of contact with the lower end of the shaft, it may be raised to lift the shaft,head and rolls to the desired elevation.

The ore is fed into a feed receptacle 30 supported by the bearing head, from which it passes by way of three feed chutes 31, to

points in front of the rolls. In rear of each roller is located a plow orscraper 32 which throws the crushed: material outward against the screen.

"vated cup 35 from which a pipe 36 depends toa point below the pan, under which it passes, and thence leads inward and connects with an upwardly extending duct 37 which delivers the lubricant to the bearing at the top, from which it distributes itself by gravity throughout the entire extent of the bearing. In a similar manner the lower bearing receives lubricant from a cup 37 through pipe 38.

A mill constructed as hereinbefore described is capable of very economical construction, as I am enabled to produce a maximum crushing action with a minimum size and weight of roll. Such a mill is also very durable in use, as the rolls are self adjusting and wear down uniformly, each continually maintaining its equilibrium and relative position and relation to the others, and the shaft lowering as the surface of the rolls wears, so that the peripheries are always kept parallel with the surface of the track. Further, the mill is capable of being easily and quickly cleaned incase of being choked, as it is only necessary to operate the screw jack and raise the shaft and with it the rollers, until the latter are raised clear of the material, when, by the removal of the proper screw, the material which has caused the clogging can be readily removed. Further, the mill may be started and the jack operated to lower the shaft until the rolls resume their crushing action.

Having thus described my invention what I claim is 1. In a crushing mill, a circular track, a vertically disposed driving shaft located centrally thereof, a driving head having a ball and socket connection with the end of said shaft, means interposed between said shaft and head for causing them to rotate in unison, and a plurality of rolls rotatably supported by bearings which are rigidly carried by said head.

2. In a crushing mill, a circular track, a vertically disposed driving shaft located centrally thereof, and having a ball head, a two part driving head having a ball socket between the parts receiving said ball head, means interposed between said shaft and driving head for causing them to rotate in unison, and a plurality of rolls rotatably supported by bearings which are rigidly carried by said head.

3. In a crushing mill, a circular track, a vertically disposed driving shaft located centrally thereof, a two-part driving head having a centrally located socket formed between the parts thereof, a ball head on the end of the shaft within said socket, a key holding said shaft and driving head against relative rotary movement, upper and lower alining half journals carried by the respective parts of the driving head, shafts journaled in said journals, and rolls carried by said shafts.

4. In a crushing mill, a circular track, a vertically disposed floating driving shaft located centrally thereof,a two-part driving head having a centrally located socket formed. between the parts thereof, a ball head on the end of the shaft within said socket, a key holding said shaft and driving head against relative rotary movement, up per and lower alining half journals carried by the respective parts of the driving head, horizontal shafts journaled in said journals, and rolls carried by said horizontal shafts, means for rotating said driving shaft without interfering with the vertical movement thereof, and means normally out of contact with said driving shaft, for raising the same.

5. In a crushing mill, a base having a lower bearing, a pan having a circular track and a central upper bearing, a floating shaft journaled in said bearings, a driving head connected to said shaft at its upper end, rolls rotatably connected with said driving head and supporting the same and the shaft, and a driving wheel on the shaft between the upper and lower bearings, and having a spline connection with the said shaft.

In testimony whereof, I afiix my signature in presence of two witnesses.

BRUCE W. TRAYLOR. Witnesses:

G. F. JOHNSTON, W. J. ROBERTS. 

